With near-endless life force, 'Millennial Tree Cookie' can preserve the field with HP restoration, and while 'Millennial Tree Cookie' is in play, 'Millennial Jade Deer' can use its self-healing effect, and becomes a sturdy addition to your team. You can also use 'Millennial Tree Cookie' from the [Age of Heroes and Kingdoms] Booster Pack to bring your fainted 'Millennial Jade Deer' to the battle area, giving you more longevity to dominate the grind game and claim victory. In addition, when you play 'Elder Faerie Cookie', you can send a LV.1 Cookie from your break area to your trash, and if your break area level total is 4 or above while attacking, you deal extra damage, giving you both healing and damage at the same time.